Hilo experiences mild temperatures year-round, with no distinct extreme seasons. Daytime highs often reach the mid-to-upper 20s Celsius in summer months (June to August), while nighttime lows can dip into single digits Celsius during winter months (December to February). Spring and autumn are marked by gradual temperature increases and decreases, respectively, with average highs ranging from 17 to 21 degrees Celsius. Temperature fluctuations between day and night are moderate throughout the year, rarely exceeding 20-25 degree Celsius range. Overall, Hilo's climate is characterized as pleasant and consistent, with minimal seasonal variations in temperature.